Manufacturer, Supplier & Exporter of EN31 Round Bar
EN31 Round Bar is a high-carbon alloy steel widely recognized for its exceptional hardness, high wear resistance, and superior strength. Riddhi Siddhi Impex, a trusted steel supplier in India, delivers premium-grade EN31 round bars suitable for demanding engineering and industrial applications. EN31, also known as 52100 steel, is commonly used in the manufacturing of components that must withstand severe wear and dynamic loads. The material's excellent hardness, machinability in annealed condition, and uniform microstructure make it a preferred choice across multiple industries..
As a leading EN31 Round Bar domestic supplier, Riddhi Siddhi Impex ensures that every bar meets stringent metallurgical specifications and quality parameters. Their EN31 bars are sourced from reputed mills and processed using modern machining and finishing technologies. Each bar undergoes strict quality checks such as hardness testing, microstructure inspection, ultrasonic testing, and dimensional accuracy verification. This ensures consistent quality and optimal performance even in highly stressed working environments.
One of the primary benefits of EN31 Round Bars is their ability to achieve high hardness through heat treatment. When oil-quenched and tempered, the material reaches very high hardness levels, making it ideal for the production of wear-resistant components. Riddhi Siddhi Impex supplies EN31 in both annealed and hardened & tempered conditions depending on customer requirements. Whether for precision machining or immediate use in critical applications, the company provides customized supply options..
EN31 is extensively used in the manufacturing of roller bearings, ball bearings, shafts, spindles, punches, taps, milling cutters, gauges, knives, and high-wear tools. Riddhi Siddhi Impex understands the requirement of industries that rely heavily on durable and dimensionally stable components. Their EN31 bars are widely preferred in the automotive, tool & die, mechanical engineering, textile, railways, and heavy-duty industrial machinery sectors..
Riddhi Siddhi Impex has established itself as a reliable supplier with a vast domestic distribution network across India. The company supplies EN31 Round Bars to major industrial cities including Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Ankleshwar, Navsari, Valsad, Rajpipla, and several other industrial locations.
EN31 Round Bar — Specification & Datasheet (Riddhi Siddhi Impex)
Specification — EN31 Round Bar
| Property | Details / Typical |
|---|---|
| Product name | EN31 Round Bar (Alloy Steel) |
| Manufacturer / Supplier | Riddhi Siddhi Impex |
| Common designation | EN31 / 52100 |
| Equivalent grades | AISI 52100, SUJ2, DIN 100Cr6 |
| Form | Hot Rolled, Forged, Bright Turned & Ground |
| Delivery conditions | Annealed, Hardened & Tempered (Q&T) |
| Size range | 10 mm – 300 mm diameter (custom sizes available) |
| Length | 3 m, 6 m, or cut-to-length |
| Typical applications | Shafts, ball bearings, rollers, spindles, gears, punches, milling cutters, knives |
| Traceability | Mill Test Certificate (MTC) available as per EN 10204 2.2 / 3.1 |
Chemical Composition (wt.%) — Typical
| Element | Typical content (%) |
|---|---|
| Carbon (C) | 0.95 – 1.05 |
| Manganese (Mn) | 0.25 – 0.45 |
| Silicon (Si) | 0.15 – 0.35 |
| Chromium (Cr) | 1.30 – 1.65 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Iron (Fe) | Balance |
Mechanical Properties — Typical
| Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness |
|---|---|---|---|---|
| Annealed | 750 – 850 | ≈ 600 | 12 – 16 | ≈ 200 HB |
| Hardened & Tempered | 900 – 1100 | ≈ 850 | 8 – 12 | HRC 60 – 64 |
| Impact / Fatigue | High wear resistance and toughness; suitable for bearing and high-stress applications | Excellent | ||
Dimension Chart — Common Sizes & Approx. Weights
| Diameter (mm) | Cross-Sectional Area (mm²) | Approx. Weight (kg/m) |
|---|---|---|
| 10 | 78.54 | 0.62 |
| 12 | 113.10 | 0.89 |
| 16 | 201.06 | 1.58 |
| 20 | 314.16 | 2.47 |
| 25 | 490.87 | 3.86 |
| 32 | 804.25 | 6.31 |
| 40 | 1256.64 | 9.86 |
| 50 | 1963.50 | 15.39 |
| 80 | 5026.55 | 39.44 |
| 100 | 7853.98 | 61.58 |
Equivalent Grades
| Standard / Region | Equivalent Grade |
|---|---|
| BS / EN | EN31 / 52100 |
| AISI / SAE | 52100 |
| DIN | 100Cr6 |
| JIS | SUJ2 |
Equivalent Standards
| Standard | Description |
|---|---|
| EN 100Cr6 | High-carbon chromium steel for bearing and wear-resistant applications |
| AISI 52100 | High-carbon chromium alloy steel |
| BS 970 (EN31) | Specification for high-carbon, high-chromium steel bars |
Other Types / Finishes
| Type | Description |
|---|---|
| Bright Turned & Ground | High surface finish, precise tolerances for bearing and shaft applications |
| Hot Rolled / Black | Economical, rougher surface for general engineering parts |
| Forged Bars | Improved strength and grain structure for critical applications |
| Hollow Bars | Weight reduction in shaft and spindle applications |
| Surface Treatments | Nitriding, induction hardening, grinding, polishing |
In addition to supplying raw material, Riddhi Siddhi Impex offers value-added services such as cutting, centerless grinding, turning, surface finishing, and hardness matching. These services help customers reduce machining time, minimize wastage, and enhance production efficiency. The company also offers customized diameters, lengths, and tolerances based on engineering drawings and project requirements..
Frequently Asked Questions (FAQs)
- Q1: What are the common applications of EN31 Round Bar?
- A1: EN31 Round Bar is widely used for manufacturing ball and roller bearings, shafts, spindles, gears, punches, dies, milling cutters, and other high-wear engineering components.
- Q2: Can Riddhi Siddhi Impex supply EN31 Round Bar in custom sizes and lengths?
- A2: Yes, we offer EN31 Round Bars in custom diameters, lengths, and tolerances according to client specifications. Both annealed and hardened & tempered conditions are available.
- Q3: What heat treatments are available for EN31 Round Bar?
- A3: EN31 can be supplied in annealed, normalized, or hardened & tempered (Q&T) conditions. Surface treatments like nitriding, induction hardening, and grinding can also be provided based on application requirements.
- Q4: Are certifications and test reports provided with EN31 Round Bar?
- A4: Yes, all EN31 bars from Riddhi Siddhi Impex are supplied with Mill Test Certificates (MTC) as per EN 10204 2.2 / 3.1 standards. Third-party inspection reports can also be arranged if required.
Cities we have supplied our products to
Mumbai, EN31 Round Bar Suplier in Delhi, EN31 Round Bar Suplier in Bengaluru(Bangalore), EN31 Round Bar Suplier in Hyderabad, EN31 Round Bar Suplier in Chennai, EN31 Round Bar Suplier in Kolkata, EN31 Round Bar Suplier in Pune, EN31 Round Bar Suplier in Ahmedabad, EN31 Round Bar Suplier in Surat, EN31 Round Bar Suplier in Vadodara, EN31 Round Bar Suplier in Rajkot, EN31 Round Bar Suplier in Nagpur, EN31 Round Bar Suplier in Indore, EN31 Round Bar Suplier in Bhopal, EN31 Round Bar Suplier in Jaipur, EN31 Round Bar Suplier in Kanpur, EN31 Round Bar Suplier in Lucknow, EN31 Round Bar Suplier in Agra, EN31 Round Bar Suplier in Varanasi, EN31 Round Bar Suplier in Amritsar, EN31 Round Bar Suplier in Chandigarh, EN31 Round Bar Suplier in Mysuru (Mysore), EN31 Round Bar Suplier in Udaipur, EN31 Round Bar Suplier in Jodhpur, EN31 Round Bar Suplier in Visakhapatnam, EN31 Round Bar Suplier in Coimbatore, EN31 Round Bar Suplier in Madurai, EN31 Round Bar Suplier in Kochi, EN31 Round Bar Suplier in Thiruvananthapuram, EN31 Round Bar Suplier in Mangalore, EN31 Round Bar Suplier in Nagpur, EN31 Round Bar Suplier in Nashik, EN31 Round Bar Suplier in Kolhapur, EN31 Round Bar Suplier in Chandrapur, EN31 Round Bar Suplier in Akola, EN31 Round Bar Suplier in Vilayat, EN31 Round Bar Suplier in Somnath, EN31 Round Bar Suplier in Dahej, EN31 Round Bar Suplier in Vadodara, EN31 Round Bar Suplier in Narmada, EN31 Round Bar Suplier in Surat, EN31 Round Bar Suplier in Ankleshwar, EN31 Round Bar Suplier in Navsari, EN31 Round Bar Suplier in Valsad, EN31 Round Bar Suplier in Rajpipla, EN31 Round Bar Suplier in Veraval, EN31 Round Bar Suplier inKovvur, EN31 Round Bar Suplier in Andra Pradesh, EN31 Round Bar Suplier inKarwar, EN31 Round Bar Suplier in Karnataka, EN31 Round Bar Suplier inKosamba, EN31 Round Bar Suplier in Gujarat, EN31 Round Bar Suplier in Vishakapatnam, EN31 Round Bar Suplier in Shahad, EN31 Round Bar Suplier in Pondicherry, EN31 Round Bar Suplier in Kakkinada, EN31 Round Bar Suplier in Andra Pradesh, EN31 Round Bar Suplier in Nagda, EN31 Round Bar Suplier in Madhya Pradesh, EN31 Round Bar Suplier inHarihar, EN31 Round Bar Suplier in Karnataka, EN31 Round Bar Suplier in Tuticorin, EN31 Round Bar Suplier in Tamilnadu, EN31 Round Bar Suplier in Trivandrum, EN31 Round Bar Suplier in KeralaKurnool, EN31 Round Bar Suplier in Andra Pradesh, EN31 Round Bar Suplier in Rourkela, EN31 Round Bar Suplier in Hindupur, EN31 Round Bar Suplier in Orissa, EN31 Round Bar Suplier in Renukoot, EN31 Round Bar Suplier in Uttar Pradesh, EN31 Round Bar Suplier in Morbi, EN31 Round Bar Suplier in Kerala , EN31 Round Bar Suplier inHimachal, EN31 Round Bar Suplier in Dehradun, EN31 Round Bar Suplier in Visakhapatnam , EN31 Round Bar Suplier inJamnagar, EN31 Round Bar Suplier in Kozhikode, EN31 Round Bar Suplier in Pondicherry, EN31 Round Bar Suplier in Ludhiana, EN31 Round Bar Suplier inLatur, EN31 Round Bar Suplier in Nanded, EN31 Round Bar Suplier in Vijaywada, EN31 Round Bar Suplier in Alwar, EN31 Round Bar Suplier in Bareilly, EN31 Round Bar Suplier in Bikaner, EN31 Round Bar Suplier in Andheri, EN31 Round Bar Suplier in Marol, EN31 Round Bar Suplier in Taloja, EN31 Round Bar Suplier in Turbhe, EN31 Round Bar Suplier in TTC (Thane-Belapur), EN31 Round Bar Suplier in Pimpri-Chinchwad, EN31 Round Bar Suplier in Chakan, EN31 Round Bar Suplier in Talegaon, EN31 Round Bar Suplier in Ranjangaon, EN31 Round Bar Suplier in Jejuri, EN31 Round Bar Suplier in Baramati, EN31 Round Bar Suplier in Satpur, EN31 Round Bar Suplier in Ambad, EN31 Round Bar Suplier in Sinnar, EN31 Round Bar Suplier in Igatpuri, EN31 Round Bar Suplier in Shendra, EN31 Round Bar Suplier in Waluj, EN31 Round Bar Suplier in Chikalthana, EN31 Round Bar Suplier in Paithan, EN31 Round Bar Suplier in Hingna, EN31 Round Bar Suplier in Butibori, EN31 Round Bar Suplier in Kalmeshwar, EN31 Round Bar Suplier in Umred, EN31 Round Bar Suplier in Shiroli, EN31 Round Bar Suplier in Kagal, EN31 Round Bar Suplier in Gokul Shirgaon, EN31 Round Bar Suplier in Akkalkot, EN31 Round Bar Suplier in Chincholi, EN31 Round Bar Suplier in Lote-Parshuram, EN31 Round Bar Suplier in Dombivli, EN31 Round Bar Suplier in Ambernath, EN31 Round Bar Suplier in Mahad, EN31 Round Bar Suplier in Roha, EN31 Round Bar Suplier in Palghar, EN31 Round Bar Suplier in Tarapur (Boisar) and for inder national
Countries we have supplied our products to
South Korea, EN31 Round Bar Exporter in Africa, EN31 Round Bar Exporter in Sri Lanka, EN31 Round Bar Exporter in Syria, EN31 Round Bar Exporter in Taiwan, EN31 Round Bar Exporter in Tanzania, EN31 Round Bar Exporter in Tajikistan, EN31 Round Bar Exporter in Thailand, EN31 Round Bar Exporter in Turkey, EN31 Round Bar Exporter in Turkmenistan, EN31 Round Bar Exporter in Ukraine, EN31 Round Bar Exporter in United Kingdom, EN31 Round Bar Exporter in Arab Emirates (UAE), EN31 Round Bar Exporter in Uzbekistan, EN31 Round Bar Exporter in Vietnam, EN31 Round Bar Exporter in Yemen, EN31 Round Bar Exporter in France, EN31 Round Bar Exporter in Germany, EN31 Round Bar Exporter in Greece, EN31 Round Bar Exporter in Oman, EN31 Round Bar Exporter in Colombia, EN31 Round Bar Exporter in Portugal, EN31 Round Bar Exporter in Japan, EN31 Round Bar Exporter in Lithuania, EN31 Round Bar Exporter in Macau, EN31 Round Bar Exporter in Mongolia, EN31 Round Bar Exporter in Qatar, EN31 Round Bar Exporter in Ireland, EN31 Round Bar Exporter in Malaysia, EN31 Round Bar Exporter in Bangladesh, EN31 Round Bar Exporter in Russia, EN31 Round Bar Exporter in Iran, EN31 Round Bar Exporter in Jordan, EN31 Round Bar Exporter in Singapore, EN31 Round Bar Exporter in Bulgaria, EN31 Round Bar Exporter in Poland, EN31 Round Bar Exporter in Denmark, EN31 Round Bar Exporter in Nigeria, EN31 Round Bar Exporter in Gambia, EN31 Round Bar Exporter in Indonesia, EN31 Round Bar Exporter in Finland, EN31 Round Bar Exporter in Argentina, EN31 Round Bar Exporter in Chile, EN31 Round Bar Exporter in Spain, EN31 Round Bar Exporter in Peru, EN31 Round Bar Exporter in Kuwait, EN31 Round Bar Exporter in India, EN31 Round Bar Exporter in Saudi Arabia, EN31 Round Bar Exporter in Slovakia, EN31 Round Bar Exporter in Slovenia, EN31 Round Bar Exporter in Sweden, EN31 Round Bar Exporter in Switzerland, EN31 Round Bar Exporter in Bahrain, EN31 Round Bar Exporter in the Netherlands, EN31 Round Bar Exporter in United Kingdom, EN31 Round Bar Exporter in Mexico, EN31 Round Bar Exporter in Bulgaria, EN31 Round Bar Exporter in Spain, EN31 Round Bar Exporter in France, EN31 Round Bar Exporter in Germany, EN31 Round Bar Exporter in Colombia, EN31 Round Bar Exporter in Brazil, EN31 Round Bar Exporter in Saudi Arabia, EN31 Round Bar Exporter in Iraq, EN31 Round Bar Exporter in Iran, EN31 Round Bar Exporter in Sudan, EN31 Round Bar Exporter in Libya, EN31 Round Bar Exporter in Tanzania, EN31 Round Bar Exporter in Nigeria, EN31 Round Bar Exporter in New Zealand, EN31 Round Bar Exporter in Paris, EN31 Round Bar Exporter in Switzerland
